Re: Problem with PlotLegend in Mathematica 6.0
- To: mathgroup at smc.vnet.net
- Subject: [mg77995] Re: Problem with PlotLegend in Mathematica 6.0
- From: dh <dh at metrohm.ch>
- Date: Thu, 21 Jun 2007 05:38:17 -0400 (EDT)
- References: <f5atgq$apg$1@smc.vnet.net>
Ho peter,
Your first example will not work on any mathematica version prior to 6.
The reason is that Plot has the attribute HoldAll. Therefore what is fed
to Plot is: fn. This will not evaluate on prior versions because the
localized x from Plot and the global x from fn are different variables
and Plot will complain. There seems to have been a (may be dangerous
because of lozalitation) change in the implementation of Plot, but there
seems stiil to exist some hickups. A way out is to overwrite the HoldAll
by: Plot[Evaulate[fn],...]
hope this helps, Daniel
peter.steneteg at gmail.com wrote:
> I can not figure out why I get different results for these two cases.
>
> Needs["PlotLegends`"]
> fn = {Sin[x], Cos[x]}
> Plot[fn, {x, 0, 2 Pi}, PlotLegend -> {"sin", "cos"}]
> Plot[{Sin[x], Cos[x]}, {x, 0, 2 Pi}, PlotLegend -> {"sin", "cos"}]
>
> When i use Plot[fn,... the Legend will only show one line, "sin" but
> if I use the later case with Plot[{Sin[x],Cos[x]},... the Legend will
> show correctly. Does anyone have any idea why this happens. And if
> there are any solution?
>
>